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//==============================================================================
// misc_modeltrain -- was plats.qc
//==============================================================================

//======================================================================
// constants
//======================================================================

const float TRAIN_STYLE_SINGLEANIM = 1; // modeltrain with one animation

const float TRAIN_ANIMTYPE_FORWARD = 1;
const float TRAIN_ANIMTYPE_BACKFORTH = 2;

//======================================================================
// fields
//======================================================================

.float first_frame2;
.float last_frame2;
.float frtime;
.float frtime2;
.float animtype;
.float animtype2;
.float multiplier;

.vector cmins;
.vector cmaxs;

.entity animcontroller;
.entity rotatecontroller;

//======================================================================
// forward declarations
//======================================================================

// temp_anim_controller
void() temp_anim_controller_think;
entity(entity own) spawn_temp_anim_controller;
void(entity e) temp_anim_controller_init;
strip void() temp_anim_controller;

// temp_rotate_controller
entity(entity own) spawn_temp_rotate_controller;
void(entity e) temp_rotate_controller_init;
strip void() temp_rotate_controller;

// misc_modeltrain
void(entity e) misc_modeltrain_init;
void() misc_modeltrain;

//------------------------------------------------------------------------------

//----------------------------------------------------------------------
// class temp_anim_controller: base_tempentity
// {
        //--------------------------------------------------------------
        void() temp_anim_controller_think =
        {
                local float first, last, step, atype, dir, nextframe;

                // train just went from stopped to moving or vice-versa,
                // and have both animations set
                if (self.state != self.owner.state &&
                        self.owner.style != TRAIN_STYLE_SINGLEANIM)
                {
                        if (self.owner.state)
                                // just started moving
                                self.owner.frame = zeroconvert (
                                        self.owner.first_frame2);
                        else
                                // just stopped
                                self.owner.frame = zeroconvert (
                                        self.owner.first_frame);

                        // reset back/forth status
                        self.owner.distance = 1;
                        self.state = self.owner.state;
                }
                else
                {
                        if (self.state &&
                                self.owner.style != TRAIN_STYLE_SINGLEANIM)
                        {
                                // moving train animation, if set
                                first = zeroconvert (self.owner.first_frame2);
                                last = zeroconvert (self.owner.last_frame2);
                                atype = self.owner.animtype2;
                        }
                        else
                        {
                                // stopped/default train animation
                                first = zeroconvert (self.owner.first_frame);
                                last = zeroconvert (self.owner.last_frame);
                                atype = self.owner.animtype;
                        }

                        if (first > last)
                                // reverse direction
                                step = dir = -1;
                        else
                                step = dir = 1;

                        // back-and-forth is going the other way, so invert
                        // the step's signal
                        if (self.owner.distance < 0)
                                step = step * (-1);

                        nextframe = self.owner.frame + step;

                        if (atype == TRAIN_ANIMTYPE_BACKFORTH)
                        {
                                if (dir > 0 && (nextframe > last ||
                                        nextframe < first) ||
                                        dir < 0 && (nextframe > first ||
                                        nextframe < last))
                                {
                                        nextframe = self.owner.frame - step;
                                        self.owner.distance =
                                                self.owner.distance * (-1);
                                }
                        }

                        if (dir > 0)
                                nextframe = wrap (nextframe, first, last);
                        else
                                nextframe = wrap (nextframe, last, first);

                        self.owner.frame = nextframe;
                }

                self.think = temp_anim_controller_think;

                if (self.state || self.owner.style == TRAIN_STYLE_SINGLEANIM)
                        self.nextthink = time + self.owner.frtime;
                else
                        self.nextthink = time + self.owner.frtime2;
        };

        //--------------------------------------------------------------
        entity(entity own) spawn_temp_anim_controller =
        {
                local entity e = spawn ();
                e.owner = own;
                temp_anim_controller_init (e);
                return e;
        };

        //--------------------------------------------------------------
        void(entity e) temp_anim_controller_init =
        {
                e.classname = "animcontroller";
                e.classtype = CT_TEMP_ANIM_CONTROLLER;
                e.state = 0;
                base_tempentity_init (e);

                if (!e.owner)
                        objerror ("temp_anim_controller_init: no owner!\n");

                e.think = temp_anim_controller_think;
                e.nextthink = time + 0.2;
        };

        //--------------------------------------------------------------
        strip void() temp_anim_controller =
        {
                temp_anim_controller_init (self);
        };
// };

//----------------------------------------------------------------------
// class temp_rotate_controller: base_tempentity
// {
        //--------------------------------------------------------------
        entity(entity own) spawn_temp_rotate_controller =
        {
                local entity e = spawn ();
                e.owner = own;
                temp_rotate_controller_init (e);
                return e;
        };

        //--------------------------------------------------------------
        void(entity e) temp_rotate_controller_init =
        {
                e.classname = "rotatecontroller";
                e.classtype = CT_TEMP_ROTATE_CONTROLLER;
                base_tempentity_init (e);
        };

        //--------------------------------------------------------------
        strip void() temp_rotate_controller =
        {
                temp_rotate_controller_init (self);
        };
// };

//----------------------------------------------------------------------
// class misc_modeltrain: base_func_train
// {
        //--------------------------------------------------------------
        void(entity e) misc_modeltrain_init =
        {
                e.classname = "misc_modeltrain";
                e.classtype = CT_MISC_MODELTRAIN;

                precache_model (e.mdl);
                base_func_train_init (e);

                if (e.spawnflags & TRAIN_NONSOLID)
                {
                        e.solid = SOLID_NOT;
                }
                else
                {
                        e.solid = SOLID_BBOX;
                        if (e.cmins == VEC_ORIGIN)
                                e.cmins = '-8 -8 -8';
                        if (e.cmaxs == VEC_ORIGIN)
                                e.cmaxs = '8 8 8';
                }

                e.movetype = MOVETYPE_NOCLIP;
                setmodel (e, e.mdl);
                setsize (e, e.cmins , e.cmaxs);
                setorigin (e, e.origin);

                e.rotatecontroller = spawn_temp_rotate_controller (e);
                e.animcontroller = spawn_temp_anim_controller (e);

                e.distance = 1;

                if (!e.frtime)
                        e.frtime = 0.1;
                if (!e.frtime2)
                        e.frtime2 = e.frtime;
                if (!e.multiplier)
                        e.multiplier = 1;

                // make sure all first and last frame fields are filled
                if (e.first_frame && !e.last_frame)
                        e.last_frame = e.first_frame;
                else if (!e.first_frame && e.last_frame)
                        e.first_frame = e.last_frame;

                if (e.first_frame2 && !e.last_frame2)
                        e.last_frame2 = e.first_frame2;
                else if (!e.first_frame2 && e.last_frame2)
                        e.first_frame2 = e.last_frame2;

                if (e.first_frame2 == 0)
                        e.style = TRAIN_STYLE_SINGLEANIM;

                if (!e.animtype)
                        e.animtype = TRAIN_ANIMTYPE_FORWARD;
                if (!e.animtype2)
                        e.animtype2 = e.animtype;

                e.frame = e.first_frame;
        };

        //--------------------------------------------------------------
        void() misc_modeltrain =
        {
                // new spawnflags for all entities -- iw
                if (SUB_Inhibit())
                        return;

                misc_modeltrain_init (self);
        };
// };